#include <stdio.h>

int main(){
    int a,b,res=2;
    code:printf("enter 2 number:\n");
    res=scanf("%d %d",&a,&b);
    if (res!=2){printf("wrong!please enter right int number\n");}
    if (res==2){
    printf("a+b=%d\n",a+b);
    printf("a-b=%d\n",a-b);
    printf("a*b=%ld\n",a*b);
    printf("a/b=%d\n",a/b);
    printf("a/b's Remainder=%d\n",a%b);
    return 0;}
}